<html>
<head>
<script type="text/javascript" src="../../Class_library/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("button").click(function(){
    $("#test").hide();
  });
});
</script>
</head>

<body>
<h2>This is a heading</h2>
<p>This is a paragraph.</p>
<p id="test">This is another paragraph.</p>
<button type="button">Click me</button>
</body>

</html>